James m



J. M. WILSON MAGNETIC INDUCTOR.

APPLICATION FILED JAN. 5, I917.

J. M. WILSON.

MAGNETIC iNDUCTOR.

APPLICATION FILED JAN. 5. 1 917.

Patented July 1, 1919 2 SHEETSSHEET 2.

2. Q JQWL UNITED STATES PAT NT OFFICE.

aniline M. win-son". NEWARK NEW JERSEY MAGNETIC INDUCTOH Specification of Letters Patent.

Patented July 1,1919.

Application filed January 5, 191?. Serial No. 140,677.

tor in which a battery current or direct current from other source is adapted to en- ..ergize pole pieces symmetrically arranged about a rotary member carrying suitable magnetically insulated inductors. Suitably spaced between the poles of the battery inagnetor magnets I preferably mount other .pole pieces forming the ends of a soft iron core or cores surrounded w th primary and secondary coils, the induced current of the sccondarycoil being adapted to be utilized at the spark plugs of an internal co1n' bustion engine.

The object of my improved device is to more eiliciently utilize a direct current for ignition purposes and to insure a better spark for less current than ordinarily obtained from a battery, and also to eliminate the destructive burning of breaker points by usng them in circuit with induced alterhating current instead of having, as is usual, the battery or direct current directly in series with the breaker or contact points.

I have also provided a switch for breaking the circuit of the battery through the battery coils and for sending the current through th'priniary coils temporarily when starting the engine.

One form of my invention is shown in the accompanying drawings, in which- Figure 1 represents a side elevation of the device.

5 Fig. 2 represents a central vertical sec- --tion through the induction coils.

Y battery magnets.

adapted to serve as the bearing for one end of the shaft 3. Another circular frame plate 4- is located above the base plate 1 and spaced therefrom by suitable tubes 5 (see Fig. 4), the two plates being held rigidly together by screw rods 6. The plate 4 is also provided with a central opening through which the small end of the shaft 7 projects,the plate l acting as a bearing for this end of the shaft. Synnnetrically arranged around the central shaft 7 are four magnets each with a crcsccnt-shaped pole piece atyeach end. Two of the magnets are battery mag nets and comprise soft iron cores 8 and 9 I surrounded bycoils 10 and 11. To each end. of the cores 8 and 9 are secured similarly shaped pole pieces 12 and 13 cut away on their inner races so as to appear crescentshaped, as seen in Fig. 4 of the drawings.

Thopole pieces 12 and 13. are rigidly Sccured to the cores 8 and 9 by screws or other suitable means and the straight electro magnets thus formed are secured between the upper frame plate 4 and the base plate 1 and permanently held in proper position as lndicated in the by suitable screws 14, drawings.

In a plane at rightangles to the plane of the battery magnets I preferably mountanother pair of soft iron cores 15 andgl6, which in the present instance are rcprescnted as laminated. It will be understood,

however, that one or both sets of magnet cores may be laminated, if desired. The induction cores 15 and 16 are likewise provided with pole pieces 17 and 18 which are cut away on the inside to lcave'thc crescent forin substantially identical with the pole pieces attached to the cores of the Each of the cores 15 and 1.6 is surrounded by a primarycoill!) and a secondary coil 20. These induction magnets are similarly secured between the base plate 1 and the upper frame plate 4 by suitable screws 21, the whole arrangement being adapted to rigidly secure the parts inposition.

On the upper and lower ends of the smaller shaft 7, adjacent the plates 1 and 4, respectively, as indicated in Fig. 2 of the drawings, I preferably secure thereto a pair of disks 22 and spaced apart by hubs at through which pins 2'5 are passed for so are thus spaced apart and between them at 7 battery,

curing the disks to the shaft 7. The disks each end I secure a pair of inductors 26 and Q'T preferably. built up of laminated soft iron segmental plates. Each pair of inductors is adapted to lie in theplane of the pole pieces 12, 13, 17 and 18 at each end of the magnet cores. The inductors are arc-shaped and not quite a complete semi-circle in length, as indicated in Figs. 4 and 5 of the drawin s. The disks 22 and 23 are preferably of brass or other suitable material for magnetically insulating the inductors.

The upper end of the shaft 7 is preferably provided with a four-lobed cam 28 secured to the shaft by a suitable screw 29, the cam being preferably of insulatirn material carried upon a metal collarm'daushing 30, as indicated in Figs. 2 and 3 of the drawings.

The inner ends of the'battcry coils 10 and 11 are preferably connected together and one of the outer ends 31 is preferably connected to the ground in any suitable manner, as through the switch 32, as represented in Fig. 5 of the drawings. The other end 33 of the battery coil is connected with the the latter being connected to the ground, as indicated in Fi 5 of the drawings. The primary windings 19 on the cores l5 .and 16 are connected together at their inner ends by connections 34, as indicated in Fig. 5, one outer end 35 being connected to the switch pivot 36, while the other end 37 is connected to an insulated contact postv 38 hearing a contact point 39 adapted to cooperate with a point 40 on an interrupter +11, diagrammatically shown in Fig. 5 and more specifically shown in Fig. 3 of the drawings. The interrupter lever 41 is connected by a suitable connection 42 with the ground. Specifically, the'interruptcr lever 41 is pivotally mounted upon the upper plate 4- by means of a screw 43, thelever being preferably insulated from the plate 4, the ground connection with the lever being made through the wire -12, as indicated in Fig. 3 of the drawings. The lever 41 is prefcrably a bent arm lever, one aim being pro vided at -l-l with an insulated plate adapted to cooperate. with the points of the fourlobcd cam 23, substantially as indicated in Fig. 3. spring 45 is adapted to press against the arm of the lever 41 and hold the contact points 39 and 40 in contact, so as to close the circuit-of the primary coil except as it is interrupted by the lobes of the cam block 2Q. Since the cam block 28 is secured to the upper end of the shaft 7 and revolves therewith the intcrrlmtion of the primary circuit will occur periodically, and the position of the points of the cam-lobes are. ad- ]ustcd to cause the. interrupter lever ll to be operated to break the primary circuit, at

secondary circuit is connected to the ground '3 of the drawings.

the point of maximum inductive effect of the inductors 2G and 27.

In order to rcducc the break spark at the contacting points 39 and 10, I preferably connect a condenser 45 between the terminal 38 and the ground. as indicated in Figs. 3 and 5 of the drawings. One end of the condenser is connected by a wire 1LT with the terminal 38. while the other end of the condenser is connected by means of a wire 48 with the ground in any suitable manner.

The secondary coils 20 have their inner and connected together by a suitable crossover connection 1!). while one end of the at 50. as indicated in Fig. 5 of the drawings. The other end of the secondary circuit is connected by a suitable wire 51 with a rotor which. in the present instance. comprises a disk 52 of insulating material provided with a inetalbushing 53 by which it is attached to the upper end .of the shaft 7 just above the ft'mr-lobcd cam block '33. as indicated in Fig. 2 of the drawings. The disk is preferably provided with an annular ring 54 with which a brush 55 cooperates. the brush projecting upward through an insulated block 56. as indicated in Figs. 2 and 7 The brush 55 is connected by means of the wire 51 with one end of the secondary coils substantially as diagrammatically illustrated in Fig. 5 of the drawings. Another brush 5? is electrically connected with the annular ring 5+ and projects through the rotor. as indicated in'Fig. 2 of the drawings, and is adapted to contact with four contact pieces 58 arranged in the four quadrants of the circle of rotation of the brush 5?. The contact pieces 58 are adapted to be connected with the four spark plugs 5!) in any suitable or preferred man ner. as indicated in Fig. 5 of the drawin s. The contact pieces 5b are preferably embedded in insulating material secured to or forming the cap or cover 50 for the upper portion of the apparatus. The lower portion of the apparatus is preferably incloscd by a cylindrical cover (31 of insulating material. The contact pieces 58 preferably cooperate with plugging in contacts 6:. formed in bosses 63 projecting from the outer surface of the cover plate (30, as indicated in Figs. 1 and 2 of the drawings.

The device may be mounted adjacent to the engine in any suitable manner, it being understood that the shaft 3 is connected with or adapted to rotate at the same speed as the cam shaftof the four-cylinder engine with which the device is to be used. The spark plugs are then connected with the 126 contact pieces 58, the connections being such as to give the. proper sequence in firing the. cylimlers. When the engine is running the shaft 3 will be rotated and at each quarter of a turn thereof the interrupter 4-1 will 130 be rocked by the lobed'cam 28 to break the primary circuit at the maximum of induc tion thereby discharging throu the rotor and one of the contact pieces the second- My current which will produce the necessary spark across the spark plug to cause ignition in the cylinder. The battery circuit under these conditions is normally closed through the ground connections, the

switch arm 36 in that case beingthrown over to the lower position null ed in Fig. 5 of the drawings, the switch arm is in between the contact), so as to ground not only the battery circuit from the wire. 31, but also the primary through the wire 35, in the manner previously describe 1,

I have found it desirable in sta ting the engine to direct the battery current through the primary circuit instead of through the magnet coils 10 and 11 thus providing for direct induction in the secoi'idzny coils. This I accomplish by moving the switch arm 36 up to the contact point 64, wl 1h, as will be seen in Fig. 5 of the drawings, is connected by a wire 65 with the battery 66. After the engine has started the switch arm 36 is thrown down to the lower position and thereafter the battery current will flow through the battery coils and energize the electro-magnets.

In the form of apparatus shown and described, I have adapted the device to a tourcylindor engine, but obviously the same principle may be applied to other types of enginessuch as six-cylindow-in which case the nun'iber of inductors and magnets may be varied to suit the conditions, the method of doing this being well undcrstoml by those skilled in the art. It is also obvious that various modifications in the arrangement and number of coils may be made to obtain similar results without departing from the spirit and scope of the invention I have herein described. By the use of the word battery in the claims, I intend to include any suitable source oi direct current.

I claim:

1. A battery magnetic inductor comprising an clcctro-magnet provided with pole pieces, a battery coil for energizing the same, a soft iron core provided with pole ends located between said cleetro-magnet pole pieces, primary'and secondary coils about said core, a pair of magnetically insulated rotary inductors adapted to direct the magnetic flux through said core altcrnately in opposite directions, an interrupter in circuit with said primary coil and a mul 'tilohed cam rotating with said inductois tt'or intermittently actuating said interrupter.

2. A battery magnetic inductor comprising a pair of straight electro-magnets on opposite sides of a rotary member, pole pieces at each end of said nuzgnets, battery coils for energizim said i primary and pole pieces, a pair of soft iron cores symmetrically arranged between and parallel with said electro-magnets, pole pieces at each end of said cores, secondary coils about each of said cores, the circuitof the primarycoils being closed by grounding, one end thereof being adapted to be connected to and grounded simultaneously with one end of said battery coils, a pair of magnetically insulated inductors at each end of said rotary member adapted to direct the magnetic flux from the pole pieces of said electromagnets through said cores alternately in opposite directions, and an interrupter in circuit with said primary coils whereby the primary circuit may bebroken intermittently.

3. A ing a pair of straight eleetro-magnets on opposite sides of a rotary member, pole pieces at each end of said magnets, battery coils for energizing said pole pieces, a pair of soft iron cores symmetrically arranged between and parallel With said electro-magnets, pole pieces at each end of said cores, primary and secondary coils about each of said cores, a pair of magnetically insulated inductors at each end of said rotary member adapted to direct the magnetic flux from the pole pieces of said electro-magnets through said cores alternately in opposite directions, an interrupter in circuit with said primary coils, and a multilobed cam rotating with said rotary member for intermittently actuating said interrupter.

4-. A battery magnetic inductor comprising a pair of straight electro-magnets on opposite sides of a rotary member, pole pieces at each end of said magnets, battery coils for energizing said pole pieces, a pair battery magnetic inductor comprisof soft iron cores symmetrically arranged between and parallel with said electro-magnets, pole pieces at each end of said cores, primary and secondary =coils about each of said cores, a pair of magnetically insulated inductors at each end of said rotary member adapted to direct the magnetic flux from the pole pieces of said electro-magnets through said cores alternately in op-Y posite directions, contact pieces arranged .in the quadrants.

of a circle about the axis or said rotary member, a rotor secured to said. rotary member carrylng a brush adapted to cooperate with said contact pieces,-

primary coil being closed by grounding, 2 adapted for breaking said grounding conrotury inductor adapted to direct the mugnection and connecting said primary coil nctic flux through said core alternately in directly with the battery and an inter- 10 opposite directions, a switch for normally rupter in circuit with said primary coil connecting the primary circuit to one end whereby the primary circuit may be broken of said battery coils and simultaneously intermittei'itly.

grounding both coils, the switch being JAMES M. WILSON. 

